Machine tor tightening bolts and nuts



R. YAMANE MACHINE FOR TIGHTENING BOLTS AND NUTS. APPLICATION FILED NOV. 20. 1918.

1,326,817. Patented Dec. 30,1919.

. 3 SHEETS-SHEET I. 2'3 26 1 3 SHEETS-SHEET 2.

R. YAMANE APPLICATION FILED NOV. 20,1918.

Patented Dec. 30,1919.

MACHINE FOR -HGHTENING BOLTS AND NUTS.

6 %7 W fiwm APPHCATION FILED NOV. 20.1918.

Patented Dec. 30,1919.

3 SHEETSSHEET 3.

fiz'o l arnarze V w vtwmo oniTEn STATES PATENT OFFICE.

RIO YAMANE, or aoosnvnn'r, WASHINGTON.

MACHINE FOR TIGHTENING BOLTS AND NUTS.

Application filed November 20, 1918.

To all whom it may concern:

Be it known that 1, Rio YAMANE, a citizen of Japan, residing at Roosevelt, in the county of Klickitat and State of VVashington, have invented new and useful Improvements in Machines for Tightening Bolts and Nuts, of which the following is a specification.

This invention relates to improvements in machines for tightening bolts and nuts and has particular application to a hand power machine of the class described.

In carrying out the present invention it is my purpose to provide a machine for tightening bolts and nuts wherein the nut engaging member or jaw may be moved into and out of engagement with the nut at the will of the operator and wherein said nut engaging member or jaw may be readily and conveniently turned in either direction to facilitate the screwing up of the nut on the bolt or the unscrewing of the nut. from the bolt.

It is also my purpose'to provide a machine of the type set forth wherein the nut engaging member or jaw may be automatically fed along with the nut when the latter is being threaded onto the bolt and wherein said member or aw will move with the nut during the rotation of the latter to disengage the bolt, thus insuring proper engagement of the nut engaglng element or jaw with the nut at all times irrespective of whether the nut is being threaded onto the bolt or revolved to disengage the bolt.

A further object of the invention is to improve and simplify the general construction of a bolt and nut tightening machine and to provide a machine which will embody comparatively few parts being so arranged and correlated as to reduce the possibility of derangement to a minimum.

A still further object of the invention is the provision of a machine of the class described which may be quickly and conveniently put into service and which may be operated with the minimum efiort on the part of the operator.

With the above recited objects in view and others of a similar nature the invention resides in the construction. combination and arrangement of parts set forth in and falling within the scope of the appended claim.

In the accompanying drawing Figure 1 is a top plan view of a nut and bolt tightening machine constructed in accordance with my present invention.

' Specification of Letters Patent.

Patented. Dec. 30, 1919.

Serial No. 263,361.

Fig. 2 is a side elevation thereof, the same being shown as applied to a track rail, the latter being in section.

Fig. 3 is an end view of my machine. i

Fig. -1 is a horizontal sectional View through the machine. Y

Fig. 5 is a cross sectional view through the same.

Fig. 6 is a similar view angles to Fig. 5.

Fig. 7 is a perspective view showing a detail of the invention.

Referringnow tothe drawing in detail 1 designates a frame which, in the present instance, comprises a base plate 2 and side plates 3-3 upstanding from the base plate '2 and spaced apart in parallelism. Pivotally connected with the outer side of one of the plates 3 at a point adjacent to the center of such plate are the ends of the legs of a frame 4. In the present instance the frame 4; is substantially V-shaped as illustrated in Fig. 1 of the drawing and connected with the frame 1 at the" apex thereof and depending therefrom is a bolt-head engaging member 5 of any suitable or appropriate construction. The legs of the frame 4 are preferably formed of two sections 6 having the adjoining ends overlapping each other and formed with bolt holes 7 adapted to interchangeably receive securing bolts 8 so that the length of the frame 4 may be lengthened or shortened as desired.

Journaled in horizontally alining bearings carried by the respective side plates 3 of the frame 1 and arranged a short distance above the base plate 2 is a shaft 9. Connected with one end of the shaft 9 through the medium of a universal joint 10 isone extremity of a stem 11, and detachably connected with the outer end of the stem 11 is a nut engaging member or jaw 12. This nut engaging member or jaw 12 alines axially with the bolt engaging portion of the member 5 sothat the bolt and nut may be held at proper alinement during the operation of the shaft 9. stem 11 and jaw 12 to thread the nut onto the bolt or withdraw the nut from the bolt. By means of the detachable connection between the jaw or nut-engaging member 12 and the stem 11. jaws of different sizes may be attached to the stem in order to accommod ate bolts of various dimensions.

The shaft 9 is capable of longitudinal movement within its bearings so thatthe nut engaging member or jaw may be moved into taken at right and out of engagement with the nut. In the I present instance the driving mechanism for rotating the shaft 9 comprises a pinion 13 splined upon the shaft 9 so that the latter may move longitudinally relatively to the pinion. Meshing with the pinion 13 is a gear wheel 14 fixed upon a counter shaft '15 journaled inaxially alining bearings carried by the side plate 3 of the frame 1, the shaft 15 being arranged in parallel relation with the shaft 9. Also fixed upon the counter shaft 15 is a ratchet wheel 16 and arranged above the shaft 15 and parallel therewith is a shaft 17 mounted in bearings carried by the side plate 3 of the frame 1. Fulcrumed upon the shaft 17 above the ratchet wheel 16 is a lever 18 provided at its pivoted Or fulcrumed end, with oppositely disposed lateral arms 19. Pivoted upon one of the arms 19 at the outer extremity thereof is a depending pawl 20; pivotally connected with the outer extremity of the other arm and depending therefrom is a pawl 21. These pawls 20 and 21 are equipped with springs 22 respectively and act to hold the pawls 20 and 21 in such position as to readily engage the ratchet wheel 16 in the swinging of the lever 18 about the shaft 17. hen the lever 18 is swung in one direction the pawl 20 engages the ratchet wheel 16 and revolves such ratchet wheel thereby imparting motion to the shaft 15, while when the lever 18 is swung in the opposite direction the pawl 20 disengages from the ratchet wheel 16 and the pawl 21.engages such ratchet wheel to impart the rotary motion to the ratchet wheel and the shaft 17. Thus in the swinging of the lever 18 first in one direction and then in the other, continuous rotary motion is imparted to the ratchet wheel 16 and the shaft 15. From the shaft 15 this continuous rotary 'motion is transmitted through the gear wheel 14 and the pinion 13 to the shaft 9 thereby revolving the shaft 9 and the nut engaging aw to thread the nut onto the bolt. In the present instance the feed ing mechanism feeding the shaft 9 longitudinally in the threading of the nut onto the bolt so that the nut engaging member or jaw will follow the nut along the bolt, comprises a vertical lever 23 fulcrumed between its ends upon a bracket 24 carried by one of the side plates 3 and having its upper end portion cooperating with a rack 25 and its lower end with a yoke 26 that straddles the shaft 9 behind the pinion 13. Surrounding the shaft 9 between the fork or bifurcated end 26 of the lever 23 and a collar 27 secured to the shaft 9 is a coiled expansion spring 28 that exerts a tension upon the collar 27 to force the shaft 9 lengthwise in its bearing in order to hold the nut engaging member or jaw 12 in engagement with the nut. WVhen the lever 23 is swung upon its pivotal connection with the brake 24.- in one direction the tension of the spring 28 is increased so that in the rotation of the shaft 9 such shaft will move lengthwise in its bearings as the nut is threaded onto the bolt, thereby insuring the proper engagement of the jaw 12 with the nut. When the lever 23 is swung in the reverse direc-. tion, the tension on the spring 28 is relieved so that the shaft 9 may be moved longitudinally in the reverse direction to disengage the jaw 12 from the nut. By the means of the rack 25 the lever 23 may be held in the desired position.

In the drawings I have shown my machine as used for tightening up the nut on the 0 bolts that hold the base plate to the opposite sides of track rails at the meeting ends of such rails and when used in this manner the head engaging member 5 engages the head of the bolt at one side of the rail, while the nut engaging member or jaw 12 engages the nut at the opposite side of the rail so that in the operation of the machine the, bolt will be held stationary and the nut inserted onto the shank of such bolt.

While I have herein shown and described one particular form of my invention by way of illustration, I wish it to be understood that I do not limit or confine myself to the precise details of construction herein described and delineated, as modification and variation may be made within the scope of the claim without departing from the spirit of the invention.

I claim: A machine of the character described, comprising a substantially horizontally arranged shaft, adapted to be rotated and moved longitudinally, a gear splined upon the shaft to rotate therewith and to permit of the longitudinal D'IOVGHTlGHt oft-he shaft with relation to the gear, a frame for supporting the shaft and having members engaging the ends of the gear to hold it against longitudinal displacement, a coil spring surrounding the shaft and adapted to automatically shift the same toward the nut being screwed up, a collar slidable upon the shaft and engaging the rear end of the coil spring to regulate its tension, a pivoted lever to adjust the collar upon the shaft, a gear permanently engaging the first named gear to drive it, means to rotate the second named gear, an element adapted to engage with the nut to turn it and connect it with said shaft, and a device connected with the frame and adapted to pass over a rail and engage with the head of the bolt to prevent its turning, said device also serving to hold the machine in place. In testimony whereof I affix my signature.

RIO YAMANE. 

